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Pawn Tuning

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Tuning of pawns, for classical evaluation:

Passed STC:
https://tests.stockfishchess.org/tests/view/5f771f0e52560f5fc78559ec
LLR: 2.96 (-2.94,2.94) {-0.25,1.25}
Total: 252696 W: 50321 L: 49692 D: 152683
Ptnml(0-2): 4614, 29845, 57049, 29978, 4862

Passed LTC:
https://tests.stockfishchess.org/tests/view/5f77cfef090dcf9aaa16d38b
LLR: 2.94 (-2.94,2.94) {0.25,1.25}
Total: 48184 W: 6556 L: 6193 D: 35435
Ptnml(0-2): 335, 4516, 14100, 4733, 408

closes https://github.com/official-stockfish/Stockfish/pull/3169

bench: 4016121
This commit is contained in:
FauziAkram 2020-10-02 15:32:19 +03:00 • committed by Joost VandeVondele
parent 17fb3a8ce0
commit 767b4f4fbe
1 changed files with 8 additions and 8 deletions
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16
src/pawns.cpp
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@ -30,21 +30,21 @@ namespace {
#define S(mg, eg) make_score(mg, eg)
// Pawn penalties
constexpr Score Backward = S( 8, 27);
constexpr Score Doubled = S(11, 55);
constexpr Score Isolated = S( 5, 17);
constexpr Score WeakLever = S( 2, 54);
constexpr Score WeakUnopposed = S(15, 25);
constexpr Score Backward = S( 8, 25);
constexpr Score Doubled = S(10, 55);
constexpr Score Isolated = S( 3, 15);
constexpr Score WeakLever = S( 3, 55);
constexpr Score WeakUnopposed = S(13, 25);
// Bonus for blocked pawns at 5th or 6th rank
constexpr Score BlockedPawn[2] = { S(-13, -4), S(-4, 3) };
constexpr Score BlockedPawn[2] = { S(-13, -4), S(-5, 2) };
constexpr Score BlockedStorm[RANK_NB] = {
S(0, 0), S(0, 0), S(76, 78), S(-10, 15), S(-7, 10), S(-4, 6), S(-1, 2)
};
// Connected pawn bonus
constexpr int Connected[RANK_NB] = { 0, 7, 8, 11, 24, 45, 85 };
constexpr int Connected[RANK_NB] = { 0, 5, 7, 11, 24, 48, 86 };
// Strength of pawn shelter for our king by [distance from edge][rank].
// RANK_1 = 0 is used for files where we have no pawn, or pawn is behind our king.
@ -147,7 +147,7 @@ namespace {
if (support | phalanx)
{
int v = Connected[r] * (2 + bool(phalanx) - bool(opposed))
+ 21 * popcount(support);
+ 22 * popcount(support);
score += make_score(v, v * (r - 2) / 4);
}